GETCO Exam Paper (30-11-2008)
The power transmitted will be maximum when

corona losses are least
sending end voltage is more
receiving end voltage is more
reactance is high

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GETCO Exam Paper (30-11-2008)
In a transformer it is difficult to measure the efficiency by output-input measurement methods because

output is out of phase with respect to input
efficiency of transformer is usually high and hence extremely accurate measurements will be necessary
losses are abnormally high
the output is sinusoidal and hence cannot be measured

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